Improvement in boilers for culfnary purposes



` W. H. CROSBY.

Domestic' Boiler, No. 36,558. 'Patented sept. v9.0, 11862..

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UNITED STATES PATENT OEEICE.

' WILLIAM H. CROSBY, OF WASHINGTON, DISTRICT OFOOLUMBIA.-

IMPROVEMENT IN BOILERS FOR CULINARY PURPOSES.

Specification forming part of Letters Patent No. 36,558, dated September 30, 1862.

To @ZZ whom it may concern:

Y Be it known that I, WILLIAM H. CROSBY, of W'ashington, in .the District of Columbia, have invented a new and useful Improvement in an Apparatus for Boiling Meats, Vegetables, &c.; and I hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure 1 represents a longitudinal vertical section at the line a.' :n of Fig. 2, through an apparatus for boiling meats, vegetables, Sto., to which my improvement is applied, with the lid or cover partially raised. Fig. 2 represents a plan or top view of the same, with the lid closed or shut down. Fig. 3 represents an under View of the lid, showing the manner in which the flanges of the same are tightened or pressed against the sides of the boiler.

My improvement consists in a new mode of packing aud closing the joints of the lid or cover of a steamboiler, whereby it may be readily removed or replaced, and yet when shut down be steam-tight. This is a greatimprovenient, for, as such boilers have heretofore been constructed, the steam would escape, causing a great waste of steam, besides Iilling the room with steam, to the great discomfort and inconvenience of those employed in it.

In the accompanying drawings, A represents a pot or boiler of any suitable form or size supported in a frame, B, of wood or mason work. The pot A is provided with a cover, C, which is hinged near the end to permit of its being opened for the entrance or removal ofthe articles to be cooked. The xed part of the lid is tirml y secured to the rim ofthe boiler,

and tits tightly around. the inner side of the rim of the boiler. Slides E2 are attached to the under side of the lid,working from one center by means of the latch F2, on the upper side, which, when the lid is closed by moving the latch F2, the iianges are pressed hard against the rim of the boiler, so that when the metal becomes heated the expansion of the copper and lead makes the joint steamtight'.

The pot is provided with an entrance-pipe, E, exitpipe F, a safety-valve, D, and a perforated false bottoni, a.

The mode of operation is as follows: Either steam or hot wat-er may be used by opening the eXit-pipeF when steam is wanted, or by closing the same when water is used. We will suppose in this instance steam to be the agent employed. The articles to be cooked are to be placed upon the false bottom a and the lid e shut down. The latch is then pressed to one side, which moves the slides on the under sides of the lid against the flanges, thus forming a tightjoint. Steam is then admitted through the pipe E, and insinnates itself through the mass of articles to be cooked. The exit-pipe F being opened and the steam permitted to escape, were it not for the pressure upon the flexible flanges against the sides of the rim of the boiler the steam would soon begin to escape and till the room, to theinconvenience of those employed therein. The safety-valve Dprevents any damage from excessive pressure of steam. IVhen the articles are sufficiently cooked, the steam is shut oft', the lid raised, and the articles removed. I do not claim, broadly, cooking articles by steam in a tightvessel; but

What I do claim as my invention is The slides E2 E2 E, operated by the latch F2, when combined with a boiler for culinary purposes, constructed and operating substantially as described. y

W. H. CROSBY. Witnesses:

THOMAS C. DoNN, GEO. H. FAYMAN. 

